Gate valve



S. W.- SPARKS em: VALVE Filed Nov. 20. 1925 r} i 2 i e 2 I 2 i 4 d J J37 r/ f C Flam- 2 BY drawing the flanges of internal b Patented Nov. 8,1927.

UNITED STATES PATENT or-Flea.

STANLEY W. SPARKS, OF SUMMIT,

GATE

OF OHIO.

VALVE.

Application filed November to, 1925. Serial No. 70,210.

This invention relates to improvements in gate valves and has for itsprincipal objects the production of a valve of this type which isextremely resistant to distortion or leal age due to high pressures andhigh temperatures and is economical to manufacture, as well asattractive in appearance.

M invention is fully set forth in detail in tlie following descriptionand drawings forming a part thereof in which Figure 1; is an elevationpartially section' of a gate valve embodying my Invention; and J g IFig. 2 is an enlarged detail section of the inner end of a hub memberWithits contact ing parts of the valve body.

Referring to the drawing and construction shown therein, referencenumeral 1 desi ates the casing of the valve body proper, tfi: same beingpreferably ofsuch configuration as to afford a lower chamber a ofsubstantiallyoblong cross section and an upper chamber 6 which is ofsubstantially circular cross section adjacent the upper end thereof. Thewalls of the lower portion of said casing are pierced to formopposing'apertures c which are adapted to receive removable internalbushing members 2 and the latter are threaded at their outer ends toreceive 1101-. low hub members 3 that are adapted to be threadedthereover. Each of said hollow hub; members is provided with an integralterminal annulus of substantially wedgeshaped configuration 4, and theouter face 03' thereof is of slightly different angularity than theco-operatmg inclined face e of the marginal recess 5 formed in thecasing 1,

which receives said wedge-shaped extension Or terminus of each hubmember. As shown, the said extensions 4 are threaded topermit of samebeing applied to the threaded outer ends of the said internal bushingmembers 2;

As shown in Fig. 2. the diameter, ofthe annulus at the point f isslightly greater than the maximum diameter of'the bevelled recess 5, sothat when the said hub is screwed into the final position shown in Fig.1, considerable pressure is exerted upon said annulus and the sameresults in a slight cold flow of the metal of the annulus thus causingit to substantially fill the recess and admitting of the wall 9intimately engaging the wall It of the hub while simultaneously ushmgmto v pressure-tight engagement with the machlned wall section 1 ofcasing 1.

This integral annulus also allows of the use of a soft high temperatureresisting metal gasket to be used between the annulus of the hub and thewall of the recess 5 as indicated by the numeral is. It is preferable toconstruct the hubs of heat treated steel of greater ductillty thancasing 1, preferably a carbon steel of .25 .to .30 per cent carbon wouldbe suitable, whereas the casing or NEW JERSEY, assrenon To run conumnusMA- cnmn comrnmr, or oommnus, OHIO, a conrona'rron body shouldpreferably be ofa .35 to .40 per cent carbon steel.

Having thus described my invention, what I claim and desire to obtain byLetters Patent of the United States is:

1. In a valve assembly, the combination comprising a valvebody havingopposing lateral. apertures respectively adapted to receive internalbushings, of said body adjacent said apertures being provided withrecesses of enlarged diameter with respectto that of the said apertures,

internal bushing members fitted in said apertures and hub members havingtapered inner ends fitted on the outer ends of said bushings.

2. In a valve assembly, the combination comprising a valve body havingopposing lateral apertures respectively adapted to receiveinternalbushings, of said body adjacent said apertures being provided withrecesses of enlarged diameter with respect to that of the saidapertures, internal bushing members fitted in said apertures and hubmembers having tapered inner ends normally of a slightly differentangularity from that of the walls of said re cesses.

3. In a valve assembly, the combination comprising a valve body havingopposing lateral apertures respectively adapted to receive internalbushings, the marginal walls of said body adjacent said apertures beinprovided with tapered recesses of enlarge diameter. with respect to thatof the said apertures, internal bushing members fitted- A the marginalwallsthe marginal walls of said bod; adjacent said apertures being steelof from .25 to .30 per cent carbon'conprovided with tapered'recesses ofenlarge diameter with respect to that of the said less ductile steel offrom .35 to .40 per cent apertures, internal bushing members fittedcarbon content.

5 in said apertures and hub members having Signed at New York in thecounty and tapered inner ends fitted on the outer ends State of New Yorkthis 6th day of Nov., of said bushings, said tapered ortions of 1925.the hub members being of hi y ductile STANLEY W. SPARKS.

tent and the adjacent walls of the body of a 10 a

